Repair plaster for a motor-car tire



Jan. 24, 1967 J. VAN DEN BERG 3,299,936

REPAIR PLASTER FOR A MOTORCAR TIRE Original Filed July 29, 1963 INVENTOR.

BY M W United States Patent Ofifice 3,299,935 Patented Jan. 24, 1967 2Claims. (:11. 152-367) This application is a continuation of applicationSerial No. 298,036 filed July 29, 1963, now abandoned.

It is conventional to make use of a repair plaster for repairing a tornor pierced motor-car tire. Such a plaster, which consists of a sheet ofrubber having reinforcement cords made of metal or textile materialembedded therein in accordance with the reinforcement of the pneumatictire to be repaired, is applied to the inner side of the tire to berepaired to cover the damaged spot of the tire with a good oversize.

Experience has taught that repairing a damaged motorcar tire with arepair plaster of this type is hardly satisfactory, even in case use ismade of a repair plaster extending through the tire to be repaired frombead to bead.

The invention is based upon the insight that this drawback is caused bythe reinforcement cords embedded in the rubber or similar material ofthe repair plaster being unsatisfactorily anchored.

It is an object of the present invention to obviate this drawback by animproved structure of a repair plaster of the subject type.

To achieve this the repair plaster according to the invention has one ora few uninterrupted reinforcement cord(s) which is or are embedded inthe plaster material in zig-zag fashion between the ends of the plaster.In addition, according to the invention, the turning points of thereinforcement cord(s) may be disposed in off-set relationship along thetransverse edges of the plaster.

On account of the or each reinforcement cord being each time curved backadjacent an end of the repair plaster in parallel relationship to itselfand within the plane of the plaster, the reinforcement cord is soanchored in the plaster material as to enable the repair plaster toresist successfully any external as well as internal load of the tirenormally to be expected in the place where said plaster is applied tothe inner side of a motor-car tire to be repaired, so that a reliablerepair of a damaged tire may indeed be spoken of.

The invention is suitable for application to a repair plaster for both atire having a cross-wise reinforcement and a tire having a radialreinforcement, because in each repair plaster reinforced in compliancewith the configuration of the reinforcement of a tire the anchoring ofthe reinforcement in the plaster material will meet the highestrequirements to be demanded of it. Naturally, it will particularly beattractive to apply the invention to repair plasters which extendthrough the tire to be repaired from bead to bead.

In illustration of the invention an embodiment of the repair plasterwill be described, by way of example, with reference to the accompanyingdrawings.

FIGURE 1 is a top view of the repair plaster;

FIGURE 2 is a section taken along the line IIII in FIGURE 1.

Referring to the drawings, the repair plaster consists of a strip 1which is beveled at the ends and made of rubber or similar material. Thestrip 1 contains a reinforcement cord 2 arranged in zig-zag fashion andpreferably consisting of metal wire or metal rope.

I claim:

1. A repair plaster for a motor-car tire, consisting of; a single thinlayer of elastic rubberlike material and a reinforcement cord entirelyembedded and an chored in said layer, said cord being uninterrupted andextending along a zig-zag path over the length of said plaster with theturning points thereof located adjacent the transverse edges of saidplaster.

2. A repair plaster according to claim 1 wherein the turning points ofsaid reinforcement cord are disposed in offset relationship along thetransverse edges of the plaster.

References Cited by the Examiner UNITED STATES PATENTS 1,310,156 7/1919Clark 152367 FOREIGN PATENTS 1,153,397 9/1957 France.

ARTHUR L. LA POINT, Primary Examiner.

C. W. HAEFELE, Assistant Examiner.

1. A REPAIR PLASTER FOR A MOTOR-CAR TIRE, CONSISTING OF; A SINGLE THINLAYER OF ELASTIC RUBBERLIKE MATERIAL AND A REINFORCEMENT CORD ENTIRELYEMBEDDED AND ANCHORED IN SAID LAYER, SAID CORD BEING UNINTERRUPTED ANDEXTENDING ALONG A ZIG-ZAG PATH OVER THE LENGTH OF SAID PLASTER WITH THETURNING POINTS THEREOF LOCATED ADJACENT THE TRANSVERSE EDGES OF SAIDPLASTER.